The ultrastructure of fossil dispersed monosulcate pollen from the Early Cretaceous of Transbaikalia, Russia

Zavialova, Natalia; Маркевич, В. С.; Бугдаева, Е. В.; Polevova, Svetlana

doi:10.1080/00173134.2011.611530

Cited by 18 publications

(13 citation statements)

References 33 publications

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“…Pollen size shows a wide range of variation. The pollen length was reported to vary from 25 to 47 µm (Audran and Masure 1978), from 27 to 29 µm (Tekleva et al 2007) and from 14 to 34 µm (Zavialova et al 2011). The values of particular characters obtained in our studies did not differ drastically from the data reported in the species description in these palynological works.…”

Section: Discussionsupporting

confidence: 30%

“…Regarding sculpturing of exine, six basic types can be distinguished: psilate, psilate-slightly striate, rugulate, regularly striate, fossulate and folded. Zavialova et al (2011) concluded that the proximal surface of boat-shaped pollen grains was rugulate. The pollen grains do not have one strict morphological pattern even within the same tree (Figs 17-25).…”

Section: Discussionmentioning

confidence: 99%

“…The results of the present study demonstrated that the sculpture of pollen grains shows considerable variation and some cultivars may have more variable pollen than others. A single aperture at the distal pole characterizes the gymnosperm taxa of higher rank Cycadoideae, Bennettitopsida and Ginkgopsida (Zavialova et al 2011), the primitive dicotyledons, e.g. Magnolia and Degeneria, and monocotyledons, e.g.…”

Section: Discussionmentioning

confidence: 99%

“…The spheroidal pollen grain has an almost rounded, convex or swollen aperture and slightly sunken margin (Tekleva et al 2007;Zavialova et al 2011). In our study we did not observe pollen grains like those described above.…”

Section: Discussionmentioning

confidence: 99%

“…Sahashi and Ueno (1986) investigated pollen with scanning electron microscopy (SEM) and concluded that the pollen surface (ulcerate) and the pollen grains are bordered by a rim from the proximal hemisphere and differ in sculpture. Audran and Masure (1978), Sahashi and Ueno (1986), Tekleva et al (2007) and Zavialova et al (2011) illustrated only the overall shape and type of sculpturing of spheroidal pollen grains of cultivated plants from France and Japan, from the Sochi arboretum and from the arboretum of the health resort 'Belye nochi', Sochi (Russia). To date there is limited research on other varieties.…”

Section: Introductionmentioning

confidence: 99%

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http://www.idpan.poznan.pl/index.php/content/vol-71/1352-71-73-81

Korszun¹,

Klimko²

2013

Dendrobiology

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Morphological features of microsporangia and pollen grains from cultivated plants of Ginkgo biloba were examined using light and scanning microscopy. The sporophylls bear mainly two pendulous microsporangia; three or four were rarely found. The sporangia dehisce along a longitudinal slit and are characterized by reticulate primary sculpture. The basic shape of pollen grains is prolate and perprolate (rarely spheroidal) and they possess a single aperture, which extends from one extremity of the pollen grain to the other. The surface is rugulate, folded, psilate, psilate-slightly striate, regularly striate and fossulate. Perforations are present. Different types of sculpture were found on the same specimens. Our results suggest that although some cultivated plants are morphologically well characterized by habit and shape of leaves, they cannot be separated based on microsporangia and pollen grain morphology. In our investigations the microsporangia and pollen grain micromorphology of eight cultivars of Ginkgo were studied for the first time, providing some important new data.

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Section: Discussionsupporting

confidence: 30%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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http://www.idpan.poznan.pl/index.php/content/vol-71/1352-71-73-81

Korszun¹,

Klimko²

2013

Dendrobiology

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The fine morphology of pollen grains from the pollen chamber of a supposed ginkgoalean seed from the Middle Jurassic of Uzbekistan (Angren locality)

et al. 2014

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Pollen morphology of selected species of the genera Chrysodracon and Dracaena (Asparagaceae, subfamily Nolinoideae) and its systematic implications

et al. 2018

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Pollen grains of 3 species from the genus Chrysodracon and 20 species from the genus Dracaena were examined by light, scanning electron and fluorescence microscopy. The basic shape of the pollen grains is subprolate and prolate, but prolatespheroidal pollen grains may also be found. Pollen of Chrysodracon and Dracaeana is dispersed as monads, rarely as dyads. In terms of size, the pollen grains studied were classified as medium-sized and large. There are two different types of apertures: monosulcate and monoulcerate in Dracaena and monoulcerate in Chrysodracon. The surface of the non-apertural areas is psilate-perforate, irregularly folded, microreticulate and fossulate. Ornamentation of the apertural region is microreticulate, microreticulate-baculate, baculate, psilate-perforate, psilate-perforate-verrucate, granulate and irregularly folded. Irregular perforations are present, and the wall structure is tectate-columellate. Our results suggest that some species of Chrysodracon and Dracaena may be separated based on their pollen grain micromorphology on the distal region.

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The ultrastructure of fossil dispersed monosulcate pollen from the Early Cretaceous of Transbaikalia, Russia

Cited by 18 publications

References 33 publications

http://www.idpan.poznan.pl/index.php/content/vol-71/1352-71-73-81

http://www.idpan.poznan.pl/index.php/content/vol-71/1352-71-73-81

The fine morphology of pollen grains from the pollen chamber of a supposed ginkgoalean seed from the Middle Jurassic of Uzbekistan (Angren locality)

Pollen morphology of selected species of the genera Chrysodracon and Dracaena (Asparagaceae, subfamily Nolinoideae) and its systematic implications

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